Jott
How about this then for an online personal assistant. You speak into Jott with your reminders, which advises iwantsandy.com who keeps track of it for you. Then Sandy will send you a reminder to your SMS, IM or Email when you wanted to be reminded. Sandy (mentioned below) also connects to Twitter, although exactly how that fits in as useful I must still figure out.
This is what I call Web Service!












